For ingress rules, only jump into zone_name_src_ACTION chains if the target is not...
[project/firewall3.git] / rules.c
diff --git a/rules.c b/rules.c
index 12c04c9..4750af7 100644 (file)
--- a/rules.c
+++ b/rules.c
 #include "rules.h"
 
 
-static struct fw3_option rule_opts[] = {
-       FW3_OPT("name",                string,   rule,     name),
-       FW3_OPT("family",              family,   rule,     family),
+const struct fw3_option fw3_rule_opts[] = {
+       FW3_OPT("enabled",             bool,      rule,     enabled),
 
-       FW3_OPT("src",                 device,   rule,     src),
-       FW3_OPT("dest",                device,   rule,     dest),
+       FW3_OPT("name",                string,    rule,     name),
+       FW3_OPT("family",              family,    rule,     family),
 
-       FW3_OPT("ipset",               device,   rule,     ipset),
+       FW3_OPT("src",                 device,    rule,     src),
+       FW3_OPT("dest",                device,    rule,     dest),
 
-       FW3_LIST("proto",              protocol, rule,     proto),
+       FW3_OPT("ipset",               setmatch,  rule,     ipset),
 
-       FW3_LIST("src_ip",             address,  rule,     ip_src),
-       FW3_LIST("src_mac",            mac,      rule,     mac_src),
-       FW3_LIST("src_port",           port,     rule,     port_src),
+       FW3_LIST("proto",              protocol,  rule,     proto),
 
-       FW3_LIST("dest_ip",            address,  rule,     ip_dest),
-       FW3_LIST("dest_port",          port,     rule,     port_dest),
+       FW3_LIST("src_ip",             network,   rule,     ip_src),
+       FW3_LIST("src_mac",            mac,       rule,     mac_src),
+       FW3_LIST("src_port",           port,      rule,     port_src),
 
-       FW3_LIST("icmp_type",          icmptype, rule,     icmp_type),
-       FW3_OPT("extra",               string,   rule,     extra),
+       FW3_LIST("dest_ip",            network,   rule,     ip_dest),
+       FW3_LIST("dest_port",          port,      rule,     port_dest),
 
-       FW3_OPT("limit",               limit,    rule,     limit),
-       FW3_OPT("limit_burst",         int,      rule,     limit.burst),
+       FW3_LIST("icmp_type",          icmptype,  rule,     icmp_type),
+       FW3_OPT("extra",               string,    rule,     extra),
 
-       FW3_OPT("target",              target,   rule,     target),
+       FW3_OPT("limit",               limit,     rule,     limit),
+       FW3_OPT("limit_burst",         int,       rule,     limit.burst),
+
+       FW3_OPT("utc_time",            bool,      rule,     time.utc),
+       FW3_OPT("start_date",          date,      rule,     time.datestart),
+       FW3_OPT("stop_date",           date,      rule,     time.datestop),
+       FW3_OPT("start_time",          time,      rule,     time.timestart),
+       FW3_OPT("stop_time",           time,      rule,     time.timestop),
+       FW3_OPT("weekdays",            weekdays,  rule,     time.weekdays),
+       FW3_OPT("monthdays",           monthdays, rule,     time.monthdays),
+
+       FW3_OPT("mark",                mark,      rule,     mark),
+       FW3_OPT("set_mark",            mark,      rule,     set_mark),
+       FW3_OPT("set_xmark",           mark,      rule,     set_xmark),
+
+       FW3_OPT("target",              target,    rule,     target),
+
+       { }
 };
 
 
+static bool
+need_src_action_chain(struct fw3_rule *r)
+{
+       return (r->_src && r->_src->log && (r->target > FW3_FLAG_ACCEPT));
+}
+
 void
 fw3_load_rules(struct fw3_state *state, struct uci_package *p)
 {
@@ -81,7 +103,15 @@ fw3_load_rules(struct fw3_state *state, struct uci_package *p)
 
                INIT_LIST_HEAD(&rule->icmp_type);
 
-               fw3_parse_options(rule, rule_opts, ARRAY_SIZE(rule_opts), s);
+               rule->enabled = true;
+
+               fw3_parse_options(rule, fw3_rule_opts, s);
+
+               if (!rule->enabled)
+               {
+                       fw3_free_rule(rule);
+                       continue;
+               }
 
                if (rule->src.invert || rule->dest.invert)
                {
@@ -109,40 +139,78 @@ fw3_load_rules(struct fw3_state *state, struct uci_package *p)
                        fw3_free_rule(rule);
                        continue;
                }
-               else if (rule->ipset.set && !rule->ipset.any &&
-                        !(rule->_ipset = fw3_lookup_ipset(state, rule->ipset.name)))
+               else if (rule->ipset.set &&
+                        !(rule->ipset.ptr = fw3_lookup_ipset(state, rule->ipset.name)))
                {
-                       warn_elem(e, "refers to not declared ipset '%s'", rule->ipset.name);
+                       warn_elem(e, "refers to unknown ipset '%s'", rule->ipset.name);
                        fw3_free_rule(rule);
                        continue;
                }
 
-               if (!rule->_src && rule->target == FW3_TARGET_NOTRACK)
+               if (!rule->_src && rule->target == FW3_FLAG_NOTRACK)
                {
                        warn_elem(e, "is set to target NOTRACK but has no source assigned");
                        fw3_free_rule(rule);
                        continue;
                }
 
+               if (!rule->set_mark.set && !rule->set_xmark.set &&
+                   rule->target == FW3_FLAG_MARK)
+               {
+                       warn_elem(e, "is set to target MARK but specifies neither "
+                                    "'set_mark' nor 'set_xmark' option");
+                       fw3_free_rule(rule);
+                       continue;
+               }
+
+               if (rule->_dest && rule->target == FW3_FLAG_MARK)
+               {
+                       warn_elem(e, "must not specify 'dest' for MARK target");
+                       fw3_free_rule(rule);
+                       continue;
+               }
+
+               if (rule->set_mark.invert || rule->set_xmark.invert)
+               {
+                       warn_elem(e, "must not have inverted 'set_mark' or 'set_xmark'");
+                       fw3_free_rule(rule);
+                       continue;
+               }
+
                if (!rule->_src && !rule->_dest && !rule->src.any && !rule->dest.any)
                {
                        warn_elem(e, "has neither a source nor a destination zone assigned "
                                     "- assuming an output rule");
                }
 
-               if (rule->target == FW3_TARGET_UNSPEC)
+               if (list_empty(&rule->proto))
+               {
+                       warn_elem(e, "does not specify a protocol, assuming TCP+UDP");
+                       fw3_parse_protocol(&rule->proto, "tcpudp", true);
+               }
+
+               if (rule->target == FW3_FLAG_UNSPEC)
                {
                        warn_elem(e, "has no target specified, defaulting to REJECT");
-                       rule->target = FW3_TARGET_REJECT;
+                       rule->target = FW3_FLAG_REJECT;
                }
-               else if (rule->target > FW3_TARGET_NOTRACK)
+               else if (rule->target > FW3_FLAG_MARK)
                {
                        warn_elem(e, "has invalid target specified, defaulting to REJECT");
-                       rule->target = FW3_TARGET_REJECT;
+                       rule->target = FW3_FLAG_REJECT;
                }
 
+               /* NB: rule family... */
                if (rule->_dest)
-                       rule->_dest->has_dest_target |= (1 << rule->target);
+               {
+                       setbit(rule->_dest->flags[0], rule->target);
+                       setbit(rule->_dest->flags[1], rule->target);
+               }
+               else if (need_src_action_chain(rule))
+               {
+                       setbit(rule->_src->flags[0], fw3_to_src_target(rule->target));
+                       setbit(rule->_src->flags[1], fw3_to_src_target(rule->target));
+               }
 
                list_add_tail(&rule->list, &state->rules);
                continue;
@@ -151,15 +219,19 @@ fw3_load_rules(struct fw3_state *state, struct uci_package *p)
 
 
 static void
-print_chain(struct fw3_rule *rule)
+append_chain(struct fw3_ipt_rule *r, struct fw3_rule *rule)
 {
-       char chain[256];
+       char chain[32];
 
-       sprintf(chain, "delegate_output");
+       snprintf(chain, sizeof(chain), "delegate_output");
 
-       if (rule->target == FW3_TARGET_NOTRACK)
+       if (rule->target == FW3_FLAG_NOTRACK)
        {
-               sprintf(chain, "zone_%s_notrack", rule->src.name);
+               snprintf(chain, sizeof(chain), "zone_%s_notrack", rule->src.name);
+       }
+       else if (rule->target == FW3_FLAG_MARK)
+       {
+               snprintf(chain, sizeof(chain), "fwmark");
        }
        else
        {
@@ -168,85 +240,122 @@ print_chain(struct fw3_rule *rule)
                        if (!rule->src.any)
                        {
                                if (rule->dest.set)
-                                       sprintf(chain, "zone_%s_forward", rule->src.name);
+                                       snprintf(chain, sizeof(chain), "zone_%s_forward",
+                                                rule->src.name);
                                else
-                                       sprintf(chain, "zone_%s_input", rule->src.name);
+                                       snprintf(chain, sizeof(chain), "zone_%s_input",
+                                                rule->src.name);
                        }
                        else
                        {
                                if (rule->dest.set)
-                                       sprintf(chain, "delegate_forward");
+                                       snprintf(chain, sizeof(chain), "delegate_forward");
                                else
-                                       sprintf(chain, "delegate_input");
+                                       snprintf(chain, sizeof(chain), "delegate_input");
                        }
                }
 
                if (rule->dest.set && !rule->src.set)
-                       sprintf(chain, "zone_%s_output", rule->dest.name);
+               {
+                       if (rule->dest.any)
+                               snprintf(chain, sizeof(chain), "delegate_output");
+                       else
+                               snprintf(chain, sizeof(chain), "zone_%s_output",
+                                        rule->dest.name);
+               }
        }
 
-       fw3_pr("-A %s", chain);
+       fw3_ipt_rule_append(r, chain);
 }
 
-static void print_target(struct fw3_rule *rule)
+static void set_target(struct fw3_ipt_rule *r, struct fw3_rule *rule)
 {
-       char target[256];
+       const char *name;
+       struct fw3_mark *mark;
+       char buf[sizeof("0xFFFFFFFF/0xFFFFFFFF\0")];
 
        switch(rule->target)
        {
-       case FW3_TARGET_ACCEPT:
-               sprintf(target, "ACCEPT");
-               break;
+       case FW3_FLAG_MARK:
+               name = rule->set_mark.set ? "--set-mark" : "--set-xmark";
+               mark = rule->set_mark.set ? &rule->set_mark : &rule->set_xmark;
+               sprintf(buf, "0x%x/0x%x", mark->mark, mark->mask);
 
-       case FW3_TARGET_DROP:
-               sprintf(target, "DROP");
-               break;
+               fw3_ipt_rule_target(r, "MARK");
+               fw3_ipt_rule_addarg(r, false, name, buf);
+               return;
+
+       case FW3_FLAG_NOTRACK:
+               fw3_ipt_rule_target(r, fw3_flag_names[rule->target]);
+               return;
 
-       case FW3_TARGET_NOTRACK:
-               sprintf(target, "NOTRACK");
+       case FW3_FLAG_ACCEPT:
+       case FW3_FLAG_DROP:
+               name = fw3_flag_names[rule->target];
                break;
 
        default:
-               sprintf(target, "REJECT");
+               name = "reject";
                break;
        }
 
        if (rule->dest.set && !rule->dest.any)
-               fw3_pr(" -j zone_%s_dest_%s\n", rule->dest.name, target);
-       else if (!strcmp(target, "REJECT"))
-               fw3_pr(" -j reject\n");
+               fw3_ipt_rule_target(r, "zone_%s_dest_%s", rule->dest.name, name);
+       else if (need_src_action_chain(rule))
+               fw3_ipt_rule_target(r, "zone_%s_src_%s", rule->src.name, name);
        else
-               fw3_pr(" -j %s\n", target);
+               fw3_ipt_rule_target(r, name);
 }
 
 static void
-print_rule(enum fw3_table table, enum fw3_family family,
-           struct fw3_rule *rule, struct fw3_protocol *proto,
+set_comment(struct fw3_ipt_rule *r, const char *name, int num)
+{
+       if (name)
+               fw3_ipt_rule_comment(r, name);
+       else
+               fw3_ipt_rule_comment(r, "@rule[%u]", num);
+}
+
+static void
+print_rule(struct fw3_ipt_handle *handle, struct fw3_state *state,
+           struct fw3_rule *rule, int num, struct fw3_protocol *proto,
            struct fw3_address *sip, struct fw3_address *dip,
            struct fw3_port *sport, struct fw3_port *dport,
            struct fw3_mac *mac, struct fw3_icmptype *icmptype)
 {
-       if (!fw3_is_family(sip, family) || !fw3_is_family(dip, family))
+       struct fw3_ipt_rule *r;
+
+       if (!fw3_is_family(sip, handle->family) ||
+           !fw3_is_family(dip, handle->family))
+       {
+               if ((sip && !sip->resolved) || (dip && !dip->resolved))
+                       info("     ! Skipping due to different family of ip address");
+
                return;
+       }
 
-       if (proto->protocol == 58 && family == FW3_FAMILY_V4)
+       if (proto->protocol == 58 && handle->family == FW3_FAMILY_V4)
+       {
+               info("     ! Skipping due to different family of protocol");
                return;
+       }
 
-       print_chain(rule);
-       fw3_format_ipset(rule->_ipset, rule->ipset.invert);
-       fw3_format_protocol(proto, family);
-       fw3_format_src_dest(sip, dip);
-       fw3_format_sport_dport(sport, dport);
-       fw3_format_icmptype(icmptype, family);
-       fw3_format_mac(mac);
-       fw3_format_limit(&rule->limit);
-       fw3_format_extra(rule->extra);
-       fw3_format_comment(rule->name);
-       print_target(rule);
+       r = fw3_ipt_rule_create(handle, proto, NULL, NULL, sip, dip);
+       fw3_ipt_rule_sport_dport(r, sport, dport);
+       fw3_ipt_rule_icmptype(r, icmptype);
+       fw3_ipt_rule_mac(r, mac);
+       fw3_ipt_rule_ipset(r, &rule->ipset);
+       fw3_ipt_rule_limit(r, &rule->limit);
+       fw3_ipt_rule_time(r, &rule->time);
+       fw3_ipt_rule_mark(r, &rule->mark);
+       set_target(r, rule);
+       fw3_ipt_rule_extra(r, rule->extra);
+       set_comment(r, rule->name, num);
+       append_chain(r, rule);
 }
 
 static void
-expand_rule(enum fw3_table table, enum fw3_family family,
+expand_rule(struct fw3_ipt_handle *handle, struct fw3_state *state,
             struct fw3_rule *rule, int num)
 {
        struct fw3_protocol *proto;
@@ -264,11 +373,12 @@ expand_rule(enum fw3_table table, enum fw3_family family,
        struct list_head empty;
        INIT_LIST_HEAD(&empty);
 
-       if (!fw3_is_family(rule, family))
+       if (!fw3_is_family(rule, handle->family))
                return;
 
-       if ((table == FW3_TABLE_RAW && rule->target != FW3_TARGET_NOTRACK) ||
-           (table != FW3_TABLE_FILTER))
+       if ((rule->target == FW3_FLAG_NOTRACK && handle->table != FW3_TABLE_RAW) ||
+           (rule->target == FW3_FLAG_MARK && handle->table != FW3_TABLE_MANGLE) ||
+               (rule->target < FW3_FLAG_NOTRACK && handle->table != FW3_TABLE_FILTER))
                return;
 
        if (rule->name)
@@ -276,6 +386,32 @@ expand_rule(enum fw3_table table, enum fw3_family family,
        else
                info("   * Rule #%u", num);
 
+       if (!fw3_is_family(rule->_src, handle->family) ||
+           !fw3_is_family(rule->_dest, handle->family))
+       {
+               info("     ! Skipping due to different family of zone");
+               return;
+       }
+
+       if (rule->ipset.ptr)
+       {
+               if (!fw3_is_family(rule->ipset.ptr, handle->family))
+               {
+                       info("     ! Skipping due to different family in ipset");
+                       return;
+               }
+
+               if (!fw3_check_ipset(rule->ipset.ptr))
+               {
+                       info("     ! Skipping due to missing ipset '%s'",
+                            rule->ipset.ptr->external
+                                       ? rule->ipset.ptr->external : rule->ipset.ptr->name);
+                       return;
+               }
+
+               set(rule->ipset.ptr->flags, handle->family, handle->family);
+       }
+
        list_for_each_entry(proto, &rule->proto, list)
        {
                /* icmp / ipv6-icmp */
@@ -298,35 +434,17 @@ expand_rule(enum fw3_table table, enum fw3_family family,
                fw3_foreach(dport, dports)
                fw3_foreach(mac, &rule->mac_src)
                fw3_foreach(icmptype, icmptypes)
-                       print_rule(table, family, rule, proto, sip, dip, sport, dport,
-                                  mac, icmptype);
+                       print_rule(handle, state, rule, num, proto, sip, dip,
+                                  sport, dport, mac, icmptype);
        }
 }
 
 void
-fw3_print_rules(enum fw3_table table, enum fw3_family family,
-                struct fw3_state *state)
+fw3_print_rules(struct fw3_ipt_handle *handle, struct fw3_state *state)
 {
        int num = 0;
        struct fw3_rule *rule;
 
        list_for_each_entry(rule, &state->rules, list)
-               expand_rule(table, family, rule, num++);
-}
-
-void
-fw3_free_rule(struct fw3_rule *rule)
-{
-       fw3_free_list(&rule->proto);
-
-       fw3_free_list(&rule->ip_src);
-       fw3_free_list(&rule->mac_src);
-       fw3_free_list(&rule->port_dest);
-
-       fw3_free_list(&rule->ip_dest);
-       fw3_free_list(&rule->port_dest);
-
-       fw3_free_list(&rule->icmp_type);
-
-       free(rule);
+               expand_rule(handle, state, rule, num++);
 }